How does mucus help to keep the airway free of dust and bacteria?

Mucus plays a crucial role in maintaining airway cleanliness by trapping dust, bacteria, and other airborne particles. Its sticky consistency allows it to capture and immobilize these harmful substances as air passes through the respiratory system. Additionally, cilia, tiny hair-like structures lining the airways, work in tandem with mucus by sweeping the trapped particles upward toward the throat, where they can be swallowed or expelled, thus preventing infections and maintaining respiratory health.